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| 体外预应力筋极限应力的简化计算方法 | |
| 引用本文： | 荣学亮,黄侨,邢世玲.体外预应力筋极限应力的简化计算方法[J].科学技术与工程,2011,11(21):5086-5093. |
| 作者姓名： | 荣学亮 黄侨 邢世玲 |
| 作者单位： | 1. 哈尔滨工业大学交通学院,哈尔滨,150090 2. 东南大学交通学院,南京,210096 3. 南京工业大学交通学院,210009 |
| 摘 要： | 为了得到一个简捷、实用、可靠的体外预应力筋极限应力设计值的计算公式,结合48片试验梁的试验数据,对常见的九种计算方法进行了评价和分析。基于评价分析结果,首先选取与试验结果相比计算准确度较高且便于应用的计算模式,然后对计算模式进行修正以满足桥梁设计的要求,最终得到一种桥梁体外预应力筋极限应力设计值的计算公式。给出两个体外预应力筋加固钢筋混凝土简支梁桥和预应力混凝土连续梁桥的极限应力计算示例,验证了公式的正确性,可供桥梁加固工程参考。 |
| 关 键 词： | 桥梁加固 体外预应力 极限应力 安全系数 |
| 收稿时间： | 4/6/2011 5:25:42 PM |
| 修稿时间： | 4/6/2011 5:25:42 PM |
Simplified Calculation Method of Ultimate Stress of External Prestressed Tendons |
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| rongxueliang,huangqiao and Xing Shi-ling.Simplified Calculation Method of Ultimate Stress of External Prestressed Tendons[J].Science Technology and Engineering,2011,11(21):5086-5093. | |
| Authors: | rongxueliang huangqiao and Xing Shi-ling |
| Institution: | RONG Xue-liang1,HUANG Qiao2,XING Shi-ling3 (School of Transportation Science and Engineering,Harbin Institute of Technology1,Harbin 150090,P.R.China,Institute of Bridge Engineering,Southeast University2,Nanjing 210096,School of Transportation Science & Engineering,Nanjing University of Technology3,Nanjing 210009,P.R.China) |
| Abstract: | To obtain a simple, practical and reliable calculation formula about design value of ultimate stress of external prestressed tendons, this paper evaluated and analyzed the common nine calculation methods, compared with experimental data of 48 test beams. Based on results of evaluation and analysis , a calculating mode was chosen which fitted experimental result and was convenient for application. Related parameters were amended to meet the requirement of bridge design and a formula for ultimate stress of external prestressed tendons was finally proposed. Two calculating demonstrations about ultimate stress of external prestressed tendons for strengthening designs of reinforced concrete simply-supported beam bridges and prestressd concrete continuous beam bridges were given. The results showed that the recommended calculation method for ultimate stress of external prestressed tendons is practical and reliable. |
| Keywords: | bridge reinforcement external prestressing ultimate stress safety factor |
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